/* ----------------------------------------------------------------------------
 * Copyright (c) Huawei Technologies Co., Ltd. 2013-2019. All rights reserved.
 * Description: System time
 * Author: liulei
 * Create: 2013-01-01
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 * 1. Redistributions of source code must retain the above copyright notice, this list of
 * conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright notice, this list
 * of conditions and the following disclaimer in the documentation and/or other materials
 * provided with the distribution.
 * 3. Neither the name of the copyright holder nor the names of its contributors may be used
 * to endorse or promote products derived from this software without specific prior written
 * permission.
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 * --------------------------------------------------------------------------- */
/* ----------------------------------------------------------------------------
 * Notice of Export Control Law
 * ===============================================
 * Huawei LiteOS may be subject to applicable export control laws and regulations, which might
 * include those applicable to Huawei LiteOS of U.S. and the country in which you are located.
 * Import, export and usage of Huawei LiteOS in any manner by you shall be in compliance with such
 * applicable export control laws and regulations.
 * --------------------------------------------------------------------------- */

#include "los_sys_pri.h"
#include "los_tick_pri.h"

#ifdef __cplusplus
#if __cplusplus
extern "C" {
#endif /* __cplusplus */
#endif /* __cplusplus */

/*****************************************************************************
Function   : LOS_TickCountGet
Description: get current tick
Input      : None
Output     : None
Return     : current tick
*****************************************************************************/
LITE_OS_SEC_TEXT_MINOR UINT64 LOS_TickCountGet(VOID)
{
    return g_tickCount;
}

/*****************************************************************************
Function   : LOS_CyclePerTickGet
Description: Get System cycle number corresponding to each tick
Input      : None
Output     : None
Return     : cycle number corresponding to each tick
*****************************************************************************/
LITE_OS_SEC_TEXT_MINOR UINT32 LOS_CyclePerTickGet(VOID)
{
    return g_sysClock / LOSCFG_BASE_CORE_TICK_PER_SECOND;
}

/*****************************************************************************
Function   : LOS_MS2Tick
Description: milliseconds convert to Tick
Input      : milliseconds
Output     : None
Return     : Tick
*****************************************************************************/
LITE_OS_SEC_TEXT_MINOR UINT32 LOS_MS2Tick(UINT32 millisec)
{
    if (millisec == 0xFFFFFFFF) {
        return 0xFFFFFFFF;
    }

    return ((UINT64)millisec * LOSCFG_BASE_CORE_TICK_PER_SECOND) / OS_SYS_MS_PER_SECOND;
}

/*****************************************************************************
Function   : LOS_Tick2MS
Description: Tick convert to milliseconds
Input      : tick
Output     : None
Return     : milliseconds
*****************************************************************************/
LITE_OS_SEC_TEXT_MINOR UINT32 LOS_Tick2MS(UINT32 tick)
{
    return ((UINT64)tick * OS_SYS_MS_PER_SECOND) / LOSCFG_BASE_CORE_TICK_PER_SECOND;
}

/*****************************************************************************
Function   : OsCpuTick2MS
Description: cycle convert to milliseconds
Input      : interval ---------- cycle
Output     : msHi    ---------- High 32 milliseconds
             msLo    ---------- Low 32 milliseconds
Return     : LOS_OK on success ,or error code on failure
*****************************************************************************/
LITE_OS_SEC_TEXT_INIT UINT32 OsCpuTick2MS(CPU_TICK *cpuTick, UINT32 *msHi, UINT32 *msLo)
{
    UINT64 tempCpuTick;
    double temp;

    if ((cpuTick == NULL) || (msHi == NULL) || (msLo == NULL)) {
        return LOS_ERRNO_SYS_PTR_NULL;
    }

    tempCpuTick = ((UINT64)cpuTick->uwCntHi << OS_SYS_MV_32_BIT) | cpuTick->uwCntLo;
    temp = tempCpuTick / (((double)g_sysClock) / OS_SYS_MS_PER_SECOND);
    tempCpuTick = (UINT64)temp;

    *msLo = (UINT32)tempCpuTick;
    *msHi = (UINT32)(tempCpuTick >> OS_SYS_MV_32_BIT);

    return LOS_OK;
}

/*****************************************************************************
Function   : OsCpuTick2US
Description: cycle convert to Microsecond
Input      : interval ---------- cycle
Output     : usHi    ---------- High 32 Microsecond
             usLo    ---------- Low 32 Microsecond
Return     : LOS_OK on success ,or error code on failure
*****************************************************************************/
LITE_OS_SEC_TEXT_INIT UINT32 OsCpuTick2US(CPU_TICK *cpuTick, UINT32 *usHi, UINT32 *usLo)
{
    UINT64 tempCpuTick;
    double temp;

    if ((cpuTick == NULL) || (usHi == NULL) || (usLo == NULL)) {
        return LOS_ERRNO_SYS_PTR_NULL;
    }

    tempCpuTick = ((UINT64)cpuTick->uwCntHi << OS_SYS_MV_32_BIT) | cpuTick->uwCntLo;
    temp = tempCpuTick / (((double)g_sysClock) / OS_SYS_US_PER_SECOND);
    tempCpuTick = (UINT64)temp;

    *usLo = (UINT32)tempCpuTick;
    *usHi = (UINT32)(tempCpuTick >> OS_SYS_MV_32_BIT);

    return LOS_OK;
}

#ifdef __cplusplus
#if __cplusplus
}
#endif /* __cplusplus */
#endif /* __cplusplus */
